US4467496A - Heavy duty polymeric spring member and combination of spring and castor construction - Google Patents

Heavy duty polymeric spring member and combination of spring and castor construction Download PDF

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Publication number
US4467496A
US4467496A US06/319,395 US31939581A US4467496A US 4467496 A US4467496 A US 4467496A US 31939581 A US31939581 A US 31939581A US 4467496 A US4467496 A US 4467496A
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United States
Prior art keywords
annulus
wheel
castor
axis
spring member
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Expired - Fee Related
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US06/319,395
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English (en)
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John D. W. Gregg
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WHEEL DEVELOPMENTS Ltd A BRITISH Co
Wheel Developments Ltd
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Wheel Developments Ltd
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Assigned to WHEEL DEVELOPMENTS LIMITED, A BRITISH COMPANY reassignment WHEEL DEVELOPMENTS LIMITED, A BRITISH COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: GREGG, JOHN D. W.
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/025—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant characterised by having a particular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/04—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors
    • B60B33/045—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors mounted resiliently, by means of dampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S16/00—Miscellaneous hardware, e.g. bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance
    • Y10S16/36—Spring

Definitions

  • This invention relates to spring members, primarily although not exclusively suitable and intended for support of a moving or vibrating article against gravity.
  • Support members for the above function include inter alia helical compression springs, leaf springs, and pneumatic support cylinders. In each case the moving parts of the support member extend generally away from the point of attachment or pressure.
  • the present invention provides a spring member of different shape which can if desired by utilised in a support environment in which the resilient movement of the spring takes place predominantly in the vicinity of, or around, one of the attachment or pressure points.
  • the invention provides a spring member having (a) a first and a second attachment adaptation secured to or integral with a first and second end, respectively, as defined by a single gap in a circular annular structure of resilient synthetic polymeric material, the cross-sectional area and cross-sectional shape of the annular structure, and the difference between its internal and external radii, allowing suitable resilience against opening and closing of the gap of the annular structure and (b) a configuration or adaptation to resist twisting deformation of the annular structure side surfaces out of planes initially generally occupied thereby.
  • the annular extent of the annular structure defined as an angle measured around the annulus between the outer extremities of the gap, preferably ranges from 200° to 350°. Most preferably it is from 270° to 330°.
  • the annular structure can be a single annulus. Preferably, it is generally provided with flat side surfaces, although toroidal or other structures are also possible. If it has flat side surfaces in this way they can be ribbed to provide a configuration to resist deformation by twisting.
  • each surface can have a single rib coaxial with the annulus itself and integral with the surface.
  • separate flat substantially rigid discs e.g. by metal can be firmly located one at each such surface to give a suitable adaptation for such resistance to twisting deformation.
  • Such discs can be movable with respect to both ends of the annular structure, or can be attached to one or other end.
  • the annular structure can be formed as two or more circular annuli, in which case it is preferable that the annuli have the same internal radii, the same external radii, and centres lying on a straight line at right angles to each annulus.
  • flat-sided annuli are usually envisaged.
  • the cross-sectional area of the annular structure is the combination of the cross-sectional areas of the separate annuli.
  • two such annuli are envisaged, in most cases spaced apart with flat sides which are parallel.
  • One or both of the first and second attachment adaptations can be arranged in common to each annulus, as discussed in more detail below.
  • annular structure as defined above can vary, it will generally speaking the within the range of 1.25 cm diameter to 30 cm diameter measured diametrally between the outer circumference.
  • the relative proportions of the inner and outer radii of the annulus depend to a large extent upon the resilient material chosen. Generally speaking, the ratio of the smaller to the larger diameter will run from 1:3 up to 4:5. Most preferably, it lies between the limits of 1:2 to 2:1.
  • the quantity expressed by the total cross-sectional annulus area divided by the difference in radii can vary over a suitable range and to some extent depends upon the actual cross-sectional area. Usually, however, it ranges from half to twice the magnitude of the difference in radius and most preferably is about the same as this quantity. This is particularly preferred if a single annulus, or a simple double annulus, is used as the annular structure.
  • one of the attachment adaptations at or near the annulus centre.
  • it can be a single integral radial connection, of the same or of a similar transverse cross-section to that of the annulus, and can extend from the centre of the annulus to one end of the interrupted annular structure.
  • the centre of such an attachment adaptation can have a transverse bore for a support member or for a supported member. Where such a transverse bore is provided it can be constituted as, or further provided with, a bearing surface.
  • a wheel or like rotary member (such as a castor for furniture) can be mounted coaxially with the annular structure.
  • Provision of an internal attachment adaptation in this way gives the possibility of altering the internal circumference relative to the external circumference, thus affecting the flexibility of the spring as discussed in more detail below.
  • Another attachment adaptation can be constituted by an external, and usually generally tangential, extension to the circular annular structure.
  • generally tangentially it is intended to include extensions, whether integral or not, at an angle of up to 45° from a true tangential direction.
  • Such an external extension can again be of the same or similar cross-section to that of the annular structure itself. It is often however convenient for it to be of a greater cross-sectional area in view of its load-bearing function.
  • it can be provided with a portion for attachment to a further frame structure.
  • Such a portion can be a fixing bracket with a flat surface preferably lies at an angle between for example 25° to 75° and more preferably 30° to 60° (e.g. 45°) to the tangential direction.
  • the extension whether internal or external, can lie in the same general plane as the annular structure, or can project from that plane.
  • the internal radial extension and an external tangential extension which may in some cases extend generally parallel to each other. Provided some gap is left in tha annular structure and the load-bearing strain has a component across this gap, some spring effect will be achieved.
  • the device is not to be confused in its action with the action of a spiral spring.
  • a central axis is rotated, giving an inward contraction to the coils.
  • a force is counterbalanced by the force needed to close a gap between the ends of an interrupted annular structure.
  • An overload on the spring member can eventually (in preferred embodiments) bring the two ends of the annular structure into contact thus preventing damage and breakage.
  • the two ends may be specially shaped to facilitate such contact and give support, rigid or otherwise, in the event of such an overload.
  • the invention extends to a support structure containing as a spring member more than one such interrupted annular structure, whether as an integral portion thereof or as an attachment thereto.
  • the invention still further extends to a wheeled or like vehicle having as a suspension connected between the axis of rotation and the vehicle frame one or more such spring members as defined above, preferably with the rotary axis of the wheel or like member lying within the loop of the annular structure.
  • the invention can be applied to wheelbarrows, wheelchairs, trolleys, bicycles, or similar light vehicles.
  • the invention provides a castor for furniture comprising: a vertical castor axis; at least one load-bearing castor wheel the axis of rotation of which does not intersect the castor axis; at least one further wheel of smaller diameter than the or each castor wheel journalled around an axis which is (a) parallel to that of the castor wheel (b) displaced from the castor wheel in the same direction as the vertical axis, and (c) lies at a height greater than the radius of the or each further wheel above that notional support plane to which the castor axis is vertical and on which the or each load-bearing wheel rests; and the same vertically resilient mounting of two different vertically resilient mountings, including a spring member as defined above for the or each castor wheel and the or each further wheel; whereby when the or each further wheel encounters a raised portion of the notional support plane, of less height than of its axis above the plane, it is temporarily and resiliently received thereon to facilitate transfer of the or each load-bearing
  • the axis of the or each further wheel can be on the same side of the vertical axis as the axis of the or each load-bearing wheel; or it can be substantially on that vertical axis; or it can even be beyond that axis. In each case, it is displaced from the axis of the or each load-bearing wheel in the same direction as the vertical axis although to a greater or less extent.
  • the or each further wheel acts as a pilot wheel or wheels to absorb the shock of pushing the article of furniture up over a small step e.g. a door sill.
  • the or each vertically resilient mounting can comprise a first and second member hinged together and separated by a resilient spring or elastomeric support.
  • the lower member can carry the or each further wheel and the pivot around the or each load-bearing wheel of the castor.
  • the upper member is suitable and intended for attachment to the article of furniture.
  • the resilience of the spring or elastomer absorbs the shock of moving up to a door sill or edge of carpet or the like.
  • a third attachment adaptation may extend from one or other end of the annular structure and carry the or each further wheel journalled therein, thus utilizing the resilience of the annular structure as the vertically resilient mounting.
  • the annular structure can be in the form of two parallel generally C-shaped portions attachable to an article of furniture at a common yoke member extending from the upper part of one end of the C-shape, each portion having as a second attachment adaptation an inwardly radial extension journalling the support wheel and having as a third attachment adaptation, extending also from the lower portion of the C-shape, a generally tangentially directed extension possessing an outer end journalling the or each further wheel.
  • the or each further wheel is resiliently mounted by virtue of the resilience of the material and shape of the annular structure, and this takes up the stresses of moving to a door sill or carpet.
  • the or each load-bearing wheel itself is journalled in the radial extension and is thus also resiliently mounted in relation to the yoke member when this is attached to an article of furniture.
  • the or each further wheel can either be a single roller mounted between two arms or can be two wheels mounted one on each end of a single shaft passing through the two arms, or on separate shafts one in each arm. In the latter case, the opportunity is presented of positioning the further wheel shaft or shafts sufficiently close to the load-bearing wheel shaft that the further wheel or wheels overlap in appearance with the load-bearing wheel or wheels, thus giving a more compact structure.
  • FIG. 1 is a side view of an annular structure having a wheel journalled therein.
  • FIG. 2 is a cross-section through II--II of FIG. 1 taken in the direction of the arrows.
  • FIG. 3 is a side view of a different embodiment of annular structure and wheel journalled therein.
  • FIG. 4 is a cross-section through III--III of FIG. 3.
  • FIG. 5 is a perspective view of an annular structure.
  • FIG. 6 is a view of a castor incorporating an annular structure as shown in FIG. 5.
  • FIG. 7 is a side view of an annular structure attached to a frame.
  • FIG. 8 is a side view of a different annular structure attached to a frame.
  • FIG. 9 shows in perspective view an annular structure provided with side surface metal discs.
  • FIG. 10 shown in broken-away perspective view an annular structure with an attachment adaptation.
  • FIG. 11 shows in side view a yet further annular structure.
  • FIG. 12 is a diagrammatic view of a support member incorporating two annular structures.
  • FIG. 13 is a side view of a further form of support member incorporating two annular structures.
  • FIG. 14 is a side view of one embodiment of a castor according to the invention.
  • FIG. 15 is a side view of a second embodiment of a modified castor.
  • FIG. 16 is a side view of a third embodiment of a castor according to the invention.
  • FIG. 17 is a side view of a fourth embodiment of a castor according to the invention.
  • FIG. 18 shows in cross-section a flexible but resilient plane member incorporating a spring according to the invention.
  • FIG. 19 shows a resilient mounting bracket for a different type of castor wheel.
  • FIG. 20 shows a yet further resilient mounting bracket
  • FIG. 21 shows a yet further mounting bracket.
  • annular structure 1 consists of two flat-sided parallel circular annuli 2 of synthetic polymer material the ratio of the internal to external diameter being 2:3 in each case and the centres lying on a line at 90° to the flat sides of each annulus.
  • the combined thickness of the two annuli is approximately the same as the difference between the internal and external radii.
  • each annulus there is an identical gap 3 in each annulus, the gaps being aligned and the annular extent of the annulus, in the example shown, being about 340° measured around the circumference between the extremity of ends 4 and 5 defined by the gap.
  • Each end 4 has an attachment adaptation formed by a single integral radial connection 6, of cross-section similar to that of each annulus terminating in an integral bearing ring 7.
  • the ends 5 each have an attachment adaptation formed by an external projection 8 at about 40° to the tangential direction, the two projections 8 being linked by an integral transverse yoke 9 with a flat fixing surface 10 again at an angle of about 40° to the general extension of projections 8.
  • a rib 11 extends around the outer flat face of each annulus 2 and along projection 8 to the flat fixing surface 10.
  • All the above structure is integrally moulded in resilient polymer material such as polyethylene, polypropylene or polyvinylchloride.
  • the annular structure 1 is shown with a ground wheel 12, with axle 13, carried in bearing rings 7.
  • this combination When this combination is loaded, e.g. when attached by fixing surface 10 to a frame of a vehicle, the resultant pressure acts to close gaps 3. Excess pressure causes the ends 4 and 5 to contact each other, thus, preventing failure of the spring.
  • the flexibility of this spring member is governed by material and relative sizes of internal and external radii and annuli thicknesses. It is also governed by the external and internal annulus circumference; if radial connection 6 had a thicker root e.g. as shown by dotted line 6a the effective resilient arc length of each annulus would be reduced.
  • the combined thickness of the annuli 2 constituting the annular structure, and the assistance of strengthening ribs 11 prevent a twisting deformation in use.
  • FIGS. 3 and 4 show a generally similar annular structure, and the same reference numerals are accordingly used.
  • the integral radial connection 6 is generally parallel to the external projection 8, as shown, the weight of a load fixed to flat surface 10 tending to open the gap 3 rather than close it.
  • the internal:external radius ratio is about 3:5.
  • FIG. 5 shows that a single annulus 14 can provide the annular structure.
  • a single annulus 14 can provide the annular structure.
  • it has an integrated internal radial connection 15 with central bearing surface 16, and an integral external projection 17 (provided with a central prolongation 18) both extending from the ends defined by gap 19.
  • FIG. 6 shows how such a spring member can form the central part of a castor construction.
  • the two halves 20 and 21 of the castor are fixed to an axle carried through bearing surface 16, and prolongation 18 being fixed for rotation in the leg of an article of furniture.
  • FIG. 7 shows an embodiment in which both attachment adaptations 22 and 23 are located externally of ends 24 and 25 defining gap 26.
  • Attachment adaptation 22 has a large diameter opening 27 therein, whereas attachment adaptation 23 is provided with integral fixing bracket 28 having bores 29 and 30 therein.
  • integral fixing bracket 28 having bores 29 and 30 therein.
  • FIG. 8 shows a similar structure to that of FIG. 7, in which the gap 33 is between the frame members (reckoned in the vertical direction shown) rather than to one side of frame member 32 as shown in FIG. 7.
  • FIG. 9 shows an integral spring member of a similar nature to those described above, having a single annulus 34 and a gap 35, internal radial connection 36 and external projection 37 of elongated form, also projecting radially from the annulus at an angle of about 45° to the internal radial connection 36.
  • Projection 37 can be attached to a frame member of a light wheeled vehicle.
  • metal plates 38 are clamped one to each side face, and for extra security can be bolted at 39 to the projections 37, as shown, to move therewith.
  • FIG. 10 illustrates that the attachment adaptations need not lie in the same general plane as each other or as annulus.
  • annulus 40 with gap 41 has integral internal radial connection 42 with central bearing hole 43, and external projection 44 also integral with the annulus but stepped backwards therefrom, as shown, terminating in a mounting prolongation 45.
  • An externally hemispherical castor wheel 46 with shaft 47 is journalled in bearing 43, as shown, whereby the resilient movement of the spring member is totally enclosed and limited against excess by the abutment of castor wheel 46 on the periphery of annulus 40.
  • FIG. 11 illustrates that the attachment adaptation need not necessarily be a projection portion or member, but can be a formation or member within one defined end of an annulus.
  • an annulus 48 with gap 49 has at end 50 an integral external projection 51 which is linked by a transverse yoke to its counterpart, not shown, in the manner described above in relation to FIGS. 2 and 4.
  • a through hole 53 which constitutes an attachment adaptation for carrying shaft 54 (jointly with its counterpart hole on the other projection 51 not shown) on which is mounted for rotation wheel 55. Resilience is still achieved by the opening and closing of gap 49, but the rotation axis of wheel 55 is not the same as the axis of the annular structure.
  • FIGS. 12 and 13 demonstrate that composite members may be made with more than one annular structure as described above.
  • annular structures 56-59 are provided in a single integral polymer moulding 60.
  • Each has an annulus e.g. 61 with two arms e.g. 62 and 63 extending away from ends 64, 65 defining a gap as at 66. If vertical pressure is exerted, annular structures 56, 58 tend to close and structures 57, 59 tend to open.
  • FIG. 13 a composite member with two annular structures 67, 68 is shown.
  • Each structure has two parallel external attachment adaptations e.g. 69,70 integral with the shorter sides of the composite member. Both gaps 71,72 thereby defined tend to close if pressure is exerted.
  • FIGS. 14 to 17 show a particular preferred combination utilising the spring members described above.
  • Castors for furniture possess load-bearing wheels of small diameter, typically less than 5 cm. This has a disadvantage if the article of furniture is to be moved over an irregularity in the floor. For example, if it is to be moved through a doorway containing a slightly raised sill, the small-diameter load-bearing castor wheel bumps into the sill and jars the furniture and any contents. This is especially so when moving up over an obstruction; moving down off an obstruction can usually be more controlled. In the case of a food or drink trolley, or of a television receiver, this shock can cause damage to the furniture or contents.
  • a castor possesses a mounting generally indicated at 101, a load-bearing wheel 102 and a further pilot wheel 103.
  • Mounting 101 is an integral polymeric structure shaped with two parallel C-shaped members 104 (only one is visible) joined by a yoke 105 carrying a vertical shaft 106.
  • Each C-shaped member has an end 107 (attached to the yoke) and an end 108 defining between them gap 109.
  • End 108 has two adaptations, the internal radial extension 110 with central bearing opening 111, and a generally tangential external extension 112 with a bearing opening 113 towards its outer end.
  • Load-bearing wheel 112 is journalled within the yoke by shaft 114 in bearing openings 11.
  • Pilot wheel 103 is of smaller diameter than load-bearing wheel 102 and is journalled by shaft 115 within parallel extensions 112 and in bearings openings 113, so that its circumference is above floor level.
  • Vertical axis A is displaced from horizontal load-bearing wheel axis B.
  • Pilot wheel axis C is parallel to axis B, and displaced therefrom in the same direction as axis A.
  • FIG. 15 which shows a modified form of the invention
  • the castor possesses a mounting 117, a load-bearing wheel 118 and two further wheels 119 (only one visible) to act as pilot wheels.
  • Mounting 117 has two parallel upper metal portions 120, only one shown, yoked together and provided with a fixing member 121, and two lower metal portions 122 (only one shown) parallel to each other and pivoted to the upper portions at 123, being spaced therefrom by an elastomeric block 124.
  • Load-bearing wheel 118 is journalled at shaft 125 in one end of each lower portion 122, and further wheels 119 (only one shown) are journalled on a common shaft 126, each outside the lower portion 122 as shown.
  • Axes A, B, and C are as described above in relation to FIG. 1.
  • axis C is on the same side as B in relation to vertical axis A, giving a more compact appearance but generally the same function.
  • FIG. 16 shows a castor with a mounting member 127 load-bearing wheel 128 and two further wheels 129 (only one being visible in the side view illustrated).
  • Mounting member 127 is a polymer moulding and has two elongate resilient parallel arms 130 joined by a yoke 131 with vertical mounting shaft 132. Each terminates in resilient C-shaped mounting 133 with bearing opening 134 the nature of this structure being generally equivalent to that described above in FIG. 14 except that load tends to open the C-shape rather than close it.
  • Load-bearing wheel 128 is journalled on shaft 136 in bearing openings 134. Wheels 129 are journalled on each on aligned separate shafts 137 in bearing bush 135. Axes A, B and C are as described above, the vertical axis A being appreciably displaced from the horizontal axes B and C, and a very compact appearance thereby achieved.
  • the castor operates as before.
  • FIG. 17 shows a castor travelling in the opposite direction to those of FIGS. 14 to 16, having a mounting member 138, a load-bearing wheel 139 and two further wheels 140 (only one shown).
  • Mounting member 138 has two parallel arms of complex shape, each including a major C-shaped region 142 and a minor C-shaped region 143, joined by a yoke 144 with a vertical fixing shaft 145. It is formed as a moulding of synthetic polymeric material.
  • Each major C-shaped region 142 has an internal radial extension 146 from one end, provided with bearing surface 147 and is resilient against opening or closing the gap 148.
  • Each minor C-shaped region 143 also possesses an internal radial extension 149 possessing bearing surface 150. It is resilient against opening or closing of the gap 151 communicating with arcuate opening 152 concentric with the major C-shaped region 142.
  • Strengthening rib 153 is provided around the major C-shaped region 142 and along the portion joining the upper part of minor C-shaped region 143.
  • Load-bearing wheel 139 is journalled inside the parallel arms of mounting members 138 by shaft 154 in bearing surfaces 147. Further wheels 140 (only one is visible) are journalled on common shaft 155 in bearing surfaces 150 to lie outside of the parallel arms of mounting member 138.
  • major C-shaped region 142 supports the furniture in normal use.
  • the further wheels temporarily take up the weight, resiliently supporting it within the minor C-shaped region 143, and thus act as pilot wheels to facilitate transfer of the load-bearing wheels to the door sill.
  • Axis C intersects vertical axis A in this instance, the trailing axis B being spaced from the vertical axis.
  • FIGS. 18 to 21 incorporate the spring members of the invention in largely self-explanatory fashion and will not be described in great detail.
  • a C-shaped member 159 is interposed between an upper fixing plate 160 and a somewhat lower mounting plate 161 for castor assembly 162, thus leaving space for flexing controlled by the action of spring member 159.
  • FIGS. 18 and 19 in particular (also possibly of FIGS. 12 and 13) lend themselves to heavy-duty extrusion techniques.
  • FIG. 20 shows a further assembly where C-shaped spring 163 integral with fixing plate 164 journals between its forked ends 165 a castor wheel 166.
  • internal stop 167 is provided, itself of somewhat flexible nature.
  • FIG. 21 shows a C-shaped spring 168 with a fixing plate 169 integral with one limb and an extension 170 attached to the other limb. Again, an internal stop 171 is provided, as shown. Extension 170 has a quadrant-like termination 172, to provide a neat appearance and safe cooperation with castor wheels 173 shown in dotted lines.

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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US06/319,395 1980-11-10 1981-11-09 Heavy duty polymeric spring member and combination of spring and castor construction Expired - Fee Related US4467496A (en)

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Application Number Priority Date Filing Date Title
GB8036046 1980-11-10
GB8036045 1980-11-10
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US5967535A (en) * 1997-08-14 1999-10-19 Graco Children's Products Inc. Swivel wheel mount
US6183405B1 (en) * 1998-10-07 2001-02-06 Signode Bernpak Gmbh Roller wheel device for supporting heavy object
FR2822795A1 (fr) * 2001-04-02 2002-10-04 Franck Jean Savard Fourche a suspension, particulierement economique a fabriquer pour vehicules equipes preferentiellement de petites roues telles que patinettes
EP1318028A3 (de) * 2001-12-05 2004-04-07 Schwarzwälder-Service Industrie- u. Gebäudereinigungsges. mbH & Co. Rollenvorrichtung für einen Transportwagen
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US20110247173A1 (en) * 2010-04-07 2011-10-13 Nguyen Long Q Systems and Methods for Caster Obstacle Management
US20120068423A1 (en) * 2010-03-21 2012-03-22 Daniel Leigh Otterson Caster wheel arrangements
US8539640B1 (en) 2012-06-08 2013-09-24 Herbert A. Waggener Caster wheel lift and brake assembly
US8650710B1 (en) 2012-12-15 2014-02-18 Herbert A. Waggener Caster wheel lift and brake assembly
US8684145B2 (en) 2010-04-07 2014-04-01 Alcon Research, Ltd. Systems and methods for console braking
CN105774887A (zh) * 2016-03-10 2016-07-20 好孩子儿童用品有限公司 儿童推车
US20160286914A1 (en) * 2015-03-31 2016-10-06 Samsonite Ip Holdings S.A R.L. Luggage article with loop-shaped wheel bracket
USD841331S1 (en) 2016-06-27 2019-02-26 Samsonite Ip Holdings S.A R.L. Luggage wheel fork with a wheel
US10464373B1 (en) * 2017-06-26 2019-11-05 Herbert A Waggener Caster wheel lift and brake assembly
US11155120B2 (en) * 2017-12-07 2021-10-26 YUEI Co., Ltd. Stage-corresponding caster device
US20230056845A1 (en) * 2021-08-23 2023-02-23 Fujifilm Business Innovation Corp. Apparatus equipped with moving tool

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FR2822795A1 (fr) * 2001-04-02 2002-10-04 Franck Jean Savard Fourche a suspension, particulierement economique a fabriquer pour vehicules equipes preferentiellement de petites roues telles que patinettes
EP1318028A3 (de) * 2001-12-05 2004-04-07 Schwarzwälder-Service Industrie- u. Gebäudereinigungsges. mbH & Co. Rollenvorrichtung für einen Transportwagen
US20050189732A1 (en) * 2002-02-15 2005-09-01 Staffan Morndal Arrangement in a wheel lifting mechanism
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JP2011126518A (ja) * 2009-12-15 2011-06-30 General Electric Co <Ge> リフト装置を備えた車輪システム
CN102126400A (zh) * 2009-12-15 2011-07-20 通用电气公司 具有升降器装置的车轮系统
US8214970B2 (en) * 2009-12-15 2012-07-10 General Electric Company Wheel system with lifter apparatus
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US20110247173A1 (en) * 2010-04-07 2011-10-13 Nguyen Long Q Systems and Methods for Caster Obstacle Management
CN102822012A (zh) * 2010-04-07 2012-12-12 爱尔康研究有限公司 用于轮脚障碍物控制的系统和方法
AU2011238867B2 (en) * 2010-04-07 2016-03-03 Alcon Inc. Systems and methods for caster obstacle management
CN102822012B (zh) * 2010-04-07 2016-07-20 爱尔康研究有限公司 轮脚组件
US8684145B2 (en) 2010-04-07 2014-04-01 Alcon Research, Ltd. Systems and methods for console braking
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US8539640B1 (en) 2012-06-08 2013-09-24 Herbert A. Waggener Caster wheel lift and brake assembly
US8650710B1 (en) 2012-12-15 2014-02-18 Herbert A. Waggener Caster wheel lift and brake assembly
US10897970B2 (en) * 2015-03-31 2021-01-26 Samsonite Ip Holdings S.A R.L. Luggage article with loop-shaped wheel bracket
US11944175B2 (en) 2015-03-31 2024-04-02 Samsonite Ip Holdings S.A R.L. Luggage article with loop-shaped wheel bracket
US20160286914A1 (en) * 2015-03-31 2016-10-06 Samsonite Ip Holdings S.A R.L. Luggage article with loop-shaped wheel bracket
CN105774887B (zh) * 2016-03-10 2018-05-04 好孩子儿童用品有限公司 儿童推车
CN105774887A (zh) * 2016-03-10 2016-07-20 好孩子儿童用品有限公司 儿童推车
USD841330S1 (en) 2016-06-27 2019-02-26 Samsonite Ip Holdings S.A R.L. Luggage wheel fork with a wheel
USD841332S1 (en) 2016-06-27 2019-02-26 Samsonite Ip Holdings S.A R.L. Luggage wheel fork with a wheel
USD848740S1 (en) 2016-06-27 2019-05-21 Samsonite Ip Holdings S.A R.L. Luggage wheel
USD841331S1 (en) 2016-06-27 2019-02-26 Samsonite Ip Holdings S.A R.L. Luggage wheel fork with a wheel
US10464373B1 (en) * 2017-06-26 2019-11-05 Herbert A Waggener Caster wheel lift and brake assembly
US11155120B2 (en) * 2017-12-07 2021-10-26 YUEI Co., Ltd. Stage-corresponding caster device
US20230056845A1 (en) * 2021-08-23 2023-02-23 Fujifilm Business Innovation Corp. Apparatus equipped with moving tool
US11801713B2 (en) * 2021-08-23 2023-10-31 Fujifilm Business Innovation Corp. Apparatus equipped with moving tool

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EP0051995B1 (de) 1986-11-26
EP0051995A1 (de) 1982-05-19
DE3175653D1 (en) 1987-01-15

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